Add rubyzip

Gemfile

@@ -16,6 +16,7 @@ gem 'tilt'
 gem 'rest-client'
 gem 'netrc'
 gem 'launchy'
+gem 'rubyzip'
 
 # Gems used only for assets and not required
 # in production environments by default.

Gemfile.lock

@@ -119,6 +119,7 @@ GEM
       json (~> 1.4)
     rest-client (1.6.7)
       mime-types (>= 1.16)
+    rubyzip (0.9.6.1)
     sass (3.1.15)
     sass-rails (3.2.5)
       railties (~> 3.2.0)
@@ -178,6 +179,7 @@ DEPENDENCIES
   pg
   rails (= 3.2.2)
   rest-client
+  rubyzip
   sass-rails
   shotgun
   sqlite3